Is the FAIRtax progressive? Do the rich pay more and the poor pay less as a percentage of their spending?

Absolutely. The poor actually pay less than zero-percent retail sales tax on their spending. Much like with the earned income tax credit of today, the prebate may give them more money than they actually spend on retail taxes. Especially if they are frugal and buy mostly used products. On the other hand, the wealthy approach a maximum of 23-percent retail sales tax on their spending.